Door-check.



A Ul Pl DOOR CHECK.

ArPLIoATIoN FILED JULY24. 19os.

91 4,340. v Patented Mar. 2, 1909.

v. Pi j Nm3 Ey UNITE@ STATES PALIENT CFFICE.

CHARLES P. DORN, OF NAPERVILLE, ILLINOIS.

DOOR-CHECK.

To all whom it may concern.'

Be it known that I, CHARLEs I). DoRN, citizen of the United States, residing at Naperville, in the county of Dupage and State of Illinois, have invented certain new and useful Improvements in Door-Checks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a novel construction in a door check, the object being to provide a simple and efficient device of this character by means of which the door may be secured at any desired peint in its movement, and consists in the features of construction and combinations of parts hereinafter fully described and claimed.

In the accompanying drawings illustrating thisinvention: Figure 1-is a plan section of a door equipped with a check constructed in accordance with my invention. Fig-Z-is a plan section of the door check. Fig-3- is a front elevation of the clamping member of the check. Fig.-4-is a longitudinal scctioii of the spring employed. Figs--and t3-are respectively a plan section and a vertical section of the clamping member.

My said device comprises a pivot member adapted to be secured to the door frame adjacent the hinged end of the door, a flat spring pivotally secured to said member, and a clamping member secured to the door and adapted to engage said fiat spring to lock the door against movement in either direction.

The particular object of the invention is to provide a door check which is simple and efficient in its construction and positive in its operation.

The device comprises the plate A provided with parallel projections B between which the looped end of the flat spring C is received. A pin D passes through said projections and said loop of said spring to pivotally secure the latter. rfhe said plate A is secured to the door frame E adjacent the hinged end of the door F and to the latter is secured the clamping member through which the free end portion of the spring C passes. Said clamping device comprises a substantially U-shaped Specification of Letters Patent.

Application filed July 24, 1908.

Patented March 2, 1909.

Serial No. 445,151.

plate G provided at the free ends ofits arms with flanges H having openings therein for the passage of screws, the said free ends of the arms of said member' being connected with each other by means of cross-bars I disposed on either side of the middle portion of saidv plate. A thuinb-screw J enters a central threaded opening in said plate G and is adapted to bear upon the spring C midway between the bearing points of the bars I thereon, thus exerting a distorting pressure on said spring whereby the latter is prevented from moving longitudinally relatively to said clamping member. The said spring C consists preferably of a folded strip of spring steel, one leaf thereof being slightly longer than the other and having its free end portion K folded over upon the free end of the shorter leaf to secure the latter. The double spring thus formed is advantageous in that it is more resilient than a single spring of the saine thickness and can be more readily firmly clamped without danger of breaking. At the same time it is sufliciently stiff to resist great compression strains without buckling.

I claim as my invention:

A door check comprising a member secured to the door casing, a fiat spring pivotally secured to said member at one end, a clamping member secured to the door and comprising a U-shaped plate provided at the free ends of its arms with flanges having openings therein, screws passing through the said openings, cross-bars connecting said arms on either side of the middle of the said plate, a thumb-screw mounted in a central threaded opening in said plate, said flat spring passing at its free end ortion between the web portion of said p ate and said cross-bars and adapted to be engaged by said thumb-screw midway between the bearing points of said bars thereon whereby a distorting pressure is exerted on said spring.

In testimony whereof I have signed my name in presence of two subscribing witnesses.

CHARLES P. DCRW.

vWitnesses:

RUDOLPH WM. Lo'rz, E. L. MOORE. 

